CN201264523Y

CN201264523Y - Leak-proof oil tank lid

Info

Publication number: CN201264523Y
Application number: CNU2008201000935U
Authority: CN
Inventors: 陈恳
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-09-24
Filing date: 2008-09-24
Publication date: 2009-07-01
Anticipated expiration: 2018-09-24

Abstract

The utility model relates to a leakage-proof oil tank cover which comprises a cover and a foam seat positioned under the cover, wherein, the foam seat is provided with a venthole and a concave pit used for placing foam, the foam covers the upper end of the venthole on the foam seat, and a leakage-proof floating plug that utilizes liquid level buoyancy to close the venthole is arranged under the foam seat. The leakage-proof floating plug comprises a floater and a needle valve arranged on the floater, a guide hole and a limited bracket, wherein, the guide hole is communicated with the venthole and is arranged below the foam seat, and the limited bracket is installed on the cover and leads the needle valve to be positioned in the guide hole all the time. When an oil tank slants, the positions of a reservoir port and the oil tank cover are descended; once the position of the oil tank cover descends to lead the floater to be contacted with the oil level, the floater floats upward under the action of buoyancy, and the venthole is closed by the needle valve; even if the angle of inclination of the oil tank is further enlarged, the oil can not be leaked outside through the venthole, so that the leakage-proof oil tank cover is especially suitable for farm machinery.

Description

A kind of leakproof fuel lid

Technical field

The utility model relates to a kind of fuel lid, and this fuel lid can prevent fuel tank leakage of oil when tilting or shaking, and is particularly suitable for the field machine fuel tank and uses.

Background technology

Most motor bikes and farm machinery adopt oil inflame as power, and the fuel oil splendid attire is in fuel tank and cover tight by fuel lid.For fuel tank internal gas pressure and barometric pressure are consistent (fuel oil could normally be supplied with like this), on fuel lid, be provided with air extractor vent, this air extractor vent is communicated with ambient atmosphere with the fuel tank inner chamber.

Existing fuel lid structure is seen Fig. 1, it comprises lid 1 and the foam seat 2 that is positioned under the lid, between lid 1 and foam seat 2, be provided with metallic gasket 3, be provided with air extractor vent 4 at foam seat 2 and metallic gasket 3 centers, lid 1 inwall is provided with groove 5 and together with above-mentioned air extractor vent 4 ambient atmosphere is communicated with fuel tank internal.Foam seat 2 is provided with pit 6 and is used to be provided with foam 7, by foam 7 air extractor vent on the foam seat 4 is covered, and when concussion took place pasta, the air extractor vent even the fluid that has swung flies out on the foam seat also can spatter on foam and be absorbed by foam, and can not leak outside like this.Though existing fuel lid structure can prevent the fluid concussion, but fuel oil leaks outside in the time of can not preventing that fuel tank from tilting, and this is that fuel oil can outflow by the groove on air extractor vent and the lid because fuel tank is when tilting, though also by foam, this moment, foam was because flow is excessive and powerless.Agricultural tillage machine industry particularly, ploughing rugged and rough is objective a large amount of existence, the problem of fuel lid leakage of oil is effectively solved always, also becomes maker's more point of accepting complaints.

The utility model content

At the prior art above shortcomings, the purpose of this utility model provide a kind of simple in structure, can prevent the fuel lid that fuel oil leaks outside by air extractor vent in the fuel tank.

The technical solution of the utility model is achieved in that a kind of leakproof fuel lid, it comprises lid and the foam seat that is positioned under the lid, on the foam seat, be provided with air extractor vent, described foam seat is provided with pit and is used to be provided with foam, cover by the upper end of foam, it is characterized in that: have at the foam seat and utilize liquid level buoyancy to close the leakproof floating plug of air extractor vent foam seat upper vent hole.

Described leakproof floating plug comprises float and the needle-valve of being located on the float, is provided with the pilot hole that is communicated with air extractor vent below the foam seat, and the position-limited rack that makes needle-valve be positioned at pilot hole all the time is installed on lid.Described position-limited rack is made up of a cylinder and the spacing card of float that is positioned at the cylinder lower end, and the spacing card of float is a hollow structure, and float is in cylinder between spacing card of float and the foam seat.

When fuel tank tilted, reservoir port and fuel lid position reduced, in case the fuel lid position is reduced to when float is contacted with pasta, under buoyancy, the float come-up is closed air extractor vent by needle-valve, even the fuel tank angle of inclination further increases, fluid can not leak outside by air extractor vent yet.For the concussion problem, liquid level is local to raise because concussion makes, and also float can be floated, thereby close air extractor vent, can not leak outside equally.

The utility model is simple in structure, handling ease, and cost is low, can prevent effectively that fuel oil leaks outside by the air extractor vent on the fuel lid in the fuel tank.

Description of drawings

Fig. 1-prior art structural representation;

Fig. 2-the utility model structural representation.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 2, from the figure as can be seen, the utility model comprises lid 1 and the foam seat 2 that is positioned under the lid, between lid 1 and foam seat 2, be provided with metallic gasket 3, center at foam seat 2 and metallic gasket 3 is equipped with air extractor vent 4, lid 1 bottom surface and wall are provided with the groove 5 that communicates, and groove 5 is communicated with ambient atmosphere together with above-mentioned air extractor vent 4 with fuel tank internal.Described foam seat 2 is provided with pit 6, is provided with foam 7 in the pit 6, is covered by the upper end of foam 7 with foam seat upper vent hole 4, has at foam seat 2 and utilizes liquid level buoyancy to close the leakproof floating plug of air extractor vent.When liquid level because of fuel tank tilts, when concussion or other reason will arrive the air extractor vent foam seat under, liquid level at first can act on the floating plug, utilize buoyancy to make the floating plug come-up with the air extractor vent obstruction and close, so fuel oil can not leak outside by air extractor vent.

As an embodiment, Fig. 2 has reflected a kind of concrete leakproof floating plug structure.As can be seen, this leakproof floating plug comprises float 8 and is located at needle-valve 9 on the float from the figure, and it is fixing by clamp 10 that float 8 backs are passed in needle-valve 9 lower ends, and the upper end is also fixing by clamp 10, makes 9 of float 8 and the needle-valves can play.Be provided with the pilot hole 11 that is communicated with air extractor vent 4 below foam seat 2, the position-limited rack that makes needle-valve 9 upper ends be positioned at pilot hole 11 all the time is installed on lid 1, in this sense, foam seat 2 also can be referred to as needle seating.This position-limited rack is made up of a cylinder 12 and the spacing card 13 of float that is positioned at the cylinder lower end, the cylinder 12 inner float bowls 14 that form, and float 8 is located in therebetween.The spacing card 13 of float is a hollow structure, and fuel oil can pass through, and the float impassabitity can only be between spacing card 13 of float and the foam seat 2 float 8.Certainly, the height of the spacing card 13 of float design need guarantee that needle-valve 9 upper ends are positioned at pilot hole 11 all the time and do not deviate from.The same with prior art, the utility model also is provided with packing seal 15, and packing seal is positioned at below the flange arrangement that forms on the cylinder.

Except float adds needle valve structure, the leakproof floating plug can also have other structure, the simplest is exactly a ball float, perhaps ball float is located on the pilot bar, also can directly be located at above-mentioned needle-valve function on the float, be about to float and needle-valve and be designed to an integral structure, float can be ball-type, bell, cylinder type, also can be other shape; Needle-valve also can have other structure, can make cylindrical shape or other shape and on its top the oil resistant caulking gum is set as needle-valve.

Claims

1, a kind of leakproof fuel lid, it comprises lid (1) and is positioned at foam seat (2) under the lid, is provided with air extractor vent (4) on foam seat (2), it is characterized in that: have at foam seat (2) and utilize liquid level buoyancy to close the leakproof floating plug of air extractor vent.

2, leakproof fuel lid according to claim 1, it is characterized in that: described leakproof floating plug comprises float (8) and is located at needle-valve (9) on the float, be provided with the pilot hole (11) that is communicated with air extractor vent (4) in foam seat (2) below, the position-limited rack that makes needle-valve (9) be positioned at pilot hole (11) all the time is installed on lid (1).

3, leakproof fuel lid according to claim 2, it is characterized in that: described position-limited rack is made up of a cylinder (12) and the spacing card of float (13) that is positioned at the cylinder lower end, the spacing card of float (13) is a hollow structure, and float (8) is positioned at cylinder (12) and is between spacing card of float (13) and the foam seat (2).

4, according to claim 1 or 2 or 3 described leakproof fuel lids, it is characterized in that: described foam seat (2) is provided with pit (6) and is used to be provided with foam (7), is covered by the upper end of foam (7) with foam seat upper vent hole (4).